nvidia_x11: current long-lived becomes a new legacy

CC: #5070.

nixos/modules/hardware/video/nvidia.nix

@@ -11,7 +11,8 @@ let
   # FIXME: should introduce an option like
   # ‘hardware.video.nvidia.package’ for overriding the default NVIDIA
   # driver.
-  enabled = elem "nvidia" drivers || elem "nvidiaLegacy173" drivers || elem "nvidiaLegacy304" drivers;
+  enabled = elem "nvidia" drivers || elem "nvidiaLegacy173" drivers
+    || elem "nvidiaLegacy304" drivers || elem "nvidiaLegacy340" drivers;
 
   nvidia_x11 =
     if elem "nvidia" drivers then
@@ -20,6 +21,8 @@ let
       config.boot.kernelPackages.nvidia_x11_legacy173
     else if elem "nvidiaLegacy304" drivers then
       config.boot.kernelPackages.nvidia_x11_legacy304
+    else if elem "nvidiaLegacy340" drivers then
+      config.boot.kernelPackages.nvidia_x11_legacy340
     else throw "impossible";
 
 in

pkgs/os-specific/linux/nvidia-x11/legacy173.nix

@@ -1,6 +1,6 @@
 {stdenv, fetchurl, kernel, xlibs, zlib, gtk, atk, pango, glib, gdk_pixbuf}:
 
-let 
+let
 
   versionNumber = "173.14.39";
 
@@ -8,9 +8,9 @@ in
 
 stdenv.mkDerivation {
   name = "nvidia-x11-${versionNumber}-${kernel.version}";
-  
-  builder = ./builder-legacy.sh;
-  
+
+  builder = ./builder-legacy173.sh;
+
   src =
     if stdenv.system == "i686-linux" then
       fetchurl {

pkgs/os-specific/linux/nvidia-x11/legacy340.nix

@@ -13,14 +13,17 @@ assert (!libsOnly) -> kernel != null;
 let
 
   versionNumber = "340.58";
-
+  /* This branch is needed for G8x, G9x, and GT2xx GPUs, and motherboard chipsets based on them.
+    Ongoing support for new Linux kernels and X servers, as well as fixes for critical bugs,
+    will be included in 340.* legacy releases through the end of 2019.
+  */
   inherit (stdenv.lib) makeLibraryPath;
 in
 
 stdenv.mkDerivation {
   name = "nvidia-x11-${versionNumber}${optionalString (!libsOnly) "-${kernel.version}"}";
 
-  builder = ./builder.sh;
+  builder = ./builder-legacy340.sh;
 
   src =
     if stdenv.system == "i686-linux" then

pkgs/top-level/all-packages.nix

@@ -8294,10 +8294,11 @@ let
 
     nvidiabl = callPackage ../os-specific/linux/nvidiabl { };
 
-    nvidia_x11 = callPackage ../os-specific/linux/nvidia-x11 { };
+    nvidia_x11 = self.nvidia_x11_legacy340;
 
     nvidia_x11_legacy173 = callPackage ../os-specific/linux/nvidia-x11/legacy173.nix { };
     nvidia_x11_legacy304 = callPackage ../os-specific/linux/nvidia-x11/legacy304.nix { };
+    nvidia_x11_legacy340 = callPackage ../os-specific/linux/nvidia-x11/legacy340.nix { };
 
     openafsClient = callPackage ../servers/openafs-client { };